(19)
(11) EP 1 741 179 A1

(12)

(43) Date of publication:
10.01.2007 Bulletin 2007/02

(21) Application number: 05736651.0

(22) Date of filing: 25.04.2005
(51) International Patent Classification (IPC): 
H02P 5/00(2006.01)
G03G 21/14(2006.01)
G03G 15/01(2006.01)
H02P 6/10(2006.01)
(86) International application number:
PCT/JP2005/008320
(87) International publication number:
WO 2005/104344 (03.11.2005 Gazette 2005/44)
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 26.04.2004 JP 2004129906

(71) Applicant: Ricoh Company, Ltd.
Tokyo 143-8555 (JP)

(72) Inventors:
  • IMAI, Satoshi, c/o RICOH COMPANY, LTD.
    Tokyo 143-8555 (JP)
  • KOIDE, Hiroshi, c/o RICOH COMPANY, LTD.
    Tokyo 143-8555 (JP)
  • KAWASHIMA, Yasunari, c/o RICOH COMPANY, LTD.
    Tokyo 143-8555 (JP)

(74) Representative: Lamb, Martin John Carstairs 
Marks & Clerk 90 Long Acre
London WC2E 9RA
London WC2E 9RA (GB)

   


(54) ROTOR DRIVING CONTROL DEVICE AND IMAGE FORMING APPARATUS